Top Stock Movers – August 21, 2025

Walmart Leads Dow Declines
Shares of Walmart (WMT) dropped sharply after the retail giant reported second-quarter profits below expectations and warned of rising tariff costs. The miss marked the retailer as the worst-performing stock in the Dow.Coty Posts Surprise Loss
Cosmetics maker Coty (COTY) also saw its stock fall after reporting an unexpected loss, citing cautious retail spending and a weaker outlook.Mixed Moves in Tech and Manufacturing
Hewlett Packard Enterprise (HPE) shares gained following a Morgan Stanley upgrade, which highlighted increased corporate spending on AI and other hardware products. Meanwhile, Maplebear (CART), the operator of Instacart, declined on a Wedbush downgrade, citing heightened competition.Nordson (NDSN), the adhesives and medical solutions company, rose after posting stronger-than-anticipated results and unveiling a $500 million stock buyback plan.